Chi Mi Na Morbheanna (The mist covered mountains)

Dib's short cry fell on deaf senses as Zim tumbled head-long into the deep pool, only having time for a quick gasp before sinking beneath the surface. He flailed about, trying to get back to the air above, but the marsh weeds twisted around his kicking legs, holding him fast. A night of adventure in the mountains leads to more than the two rivals were bargaining for...